Tuya ZigBee T&H&Siren 2-IN-1 Sensor: Detects environmental conditions in real-time. Siren alarm louder than 90DB. Alarm Notifications: Your smartphone will receive instant notifications when the siren alarm is triggered, and you can check the log on the app. Widely used in homes, kitchens, offices, etc. Smart Scenarios: It can also be combined with other smart Wi-Fi products based on Tuya to design and implement intelligent application scenarios. Ultra-responsive, anti-interference capability, ultra-low power consumption, and cost-effective. Supports 5V 1A USB port power supply. Standby Current: 61uA-180uA USB Port: 5V/1A Sound Intensity: 90db Detection Temperature: -10℃-80℃ Detection Humidity: 0%-100% Wireless Frequency: 2.4GHZ Communication Protocol: Zigbee 3.0 Wireless: Zigbee IEEE 802.15.4 Wireless Range: 40M Color: White Material: plastic Package Contents: 1 * 2 in 1 Siren Sensor Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to differ slightly from the real one. The allowable measurement error is +/- 1-3 cm.